The w:planetary nebulaNGC 2438 appears to lie within the cluster near its northern edge (the faint smudge at the top center of the image), but it is most likely unrelated since it does not share the cluster's radial velocity.[1][2] The case is yet another example of a superposed pair, joining the famed case of w:NGC 2818. [3][1]

M46 is about a degree east of M47 in the sky, so the two fit well in a binocular or wide-angle telescope field.